Keysight Technologies N9340B, User Manual

Page: 66 / 172

Making Measurements

Making a Reflection Calibration Measurement
60
2 Connect the tracking generator output of the analyzer
to the directional bridge or coupler.
3 Connect the analyzer input to the coupled port of the
directional bridge or coupler.
4 Press [Preset] to perform a factory preset.
5 Turn on the tracking generator and if necessary, set
the output power to –10 dBm:
Press [MODE] > {Track Generator} > {Amplitude (On)}
> –10 > {dBm}
6 Set the start and stop frequencies and resolution
bandwidth:
• Press [FREQ] > {Start Freq} > 100 > {MHz}
• Press [FREQ] > {Stop Freq} > 1 > {GHz}
• Press [BW/Avg] > 1 > MHz
7 Replace the DUT with a short circuit.
8 Normalize the trace:
Press [MEAS] > {Normalize} > {Store Ref (1→4)} >
{Normalize (On)}
This activates the trace 1 minus trace 4 function and
displays the results in trace 1.

The normalized trace or flat line represents 0 dB
return loss. Normalization occurs with each sweep.
Replace the short (cal device) with the DUT.
CAU-
CAUTION
Excessive signal input may damage the DUT. Do not exceed
the maximum power that the device under test can tolerate.
NOTE
Since the reference trace is stored in trace 4, changing trace 4
to Clear Write invalidates the normalization.